This is to disable search function in your website and redirect to homepage and 404 Page.

Copy and paste the following code in the functions.php of our current theme.


<?php
//disable search on browser
function wpb_filter_query( $query, $error = true ) {
if ( is_search() ) {
$query->is_search = false;
$query->query_vars['s'] = false;
$query->query['s'] = false;
if ( $error == true )
$query->is_404 = true;
}
}
add_action( 'parse_query', 'wpb_filter_query' );
add_filter( 'get_search_form', function( $a ){return $a;});

//unregister search widget
function remove_search_widget() {
	unregister_widget('WP_Widget_Search');
}
add_action( 'widgets_init', 'remove_search_widget' );